My Hybrid Amp Project - Finally built!

[Ettore_M]

So, this wants a proper build report! (It's on Open Discussion too: http://www.madbeanpedals.com/forum/index.php?topic=6957.0)



Finally and properly built it and it works! Sounds great! But you'll be the judges! 

Took me a year from design to a final build. But I truly worked on it approximately two months. Yeah, I know, unacceptable, but things happen in life, and we lose interest. 

Nevertheless, I never forget the idea and after the summer, I got to it again. As my other responsibilities allowed me, of course. 
But now it's finally built and I'm really happy with it! 
It's the first circuit I designed (if designing is glueing different pieces of circuitry together to make a finished product..  )

Not yet labelled or knobbed, but the knobs are (from left to right): MASTER VOL - GAIN - BASS - MIDDLE - TREBLE.

Pretty complicated build, and I had several issues with it! NOISE was the most important. And it took me a lot time to understand that it is a grounding issue! Now I know! Always use STAR GROUNDING! Always...!

Inside:



And finally, the appropriate sound clip!

[soundcloud]https://soundcloud.com/ettore_m/hybrid-amp-demo-as-of-29-12[/soundcloud]

Hope you like it! 

Hector

P.S. Note that the schematic used for this is not the one on the first page on the other thread.

[Vallhagen]

Great job here Hector! I listned through the soundclip and it sounds just clean and nice. Funny thing is that the two amps i have for bedroom purposes is the lil watter and the micro terror, the two who inspired you in the first place, right:) ...

How loud is it, if you compare to the mentioned ones? its hard to say by a soundclip how loud an amp really are. Or do you have a calculated/measured wattage on it?

Cheers!

[juansolo]

That sounds rather excellent. 

[m-Kresol]

It sounds really good. Post some pics when your done with the outside work. I hope my amp will sound as nice as this one; I want to start in January, if my friend has time for it.

[sirbergersworth]

Completely unrelated but I never thought about setting my special 6 on its face.
Great idea! I already stole it. Lol
What's the switch do?



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[Cortexturizer]

Great work!

[lincolnic]

Sounds great! Be proud.

[jtn191]

Nice job!

So the power amp is the TDA2040? I'm planning a build of this project http://diyguitarfreak.wordpress.com/2010/09/15/the-miniamp-2-0/ but but it would be interesting to look at doing a hybrid amp.

Also what song are you playing in the demo clip? I've heard it before...

[Ettore_M]

So, that's quite a lot of feedback! 
Thank you guys! I'm pretty proud of this one, and it sounds pretty damn good to my ears. 

Great job here Hector! I listned through the soundclip and it sounds just clean and nice. Funny thing is that the two amps i have for bedroom purposes is the lil watter and the micro terror, the two who inspired you in the first place, right:) ...

How loud is it, if you compare to the mentioned ones? its hard to say by a soundclip how loud an amp really are. Or do you have a calculated/measured wattage on it?

Cheers!

Thanks, Bengt! Indeed, these two amps were the inspiration for this one. I saw Corey's (nzCdog) project and a friend's Micro Terror, and got me to design a DIY project with a little more wattage in it, just like the Micro Terror.
I have not built the Lil Watter and I don't own a Micro Terror, but from what I remember, it's really close to the Micro Terror in terms of loudness.
I cannot quite measure wattage at the moment as I need dummy loads (resistors) and I don't have them. But from the TDA's datasheet, it should be something like 10 watts with a 12V supply to an 8 ohm speaker.

Completely unrelated but I never thought about setting my special 6 on its face.
Great idea! I already stole it. Lol
What's the switch do?

Haha! Yeah! It's pretty nice sitting on its face. But I just had it like that, because I stole its tube for the little one! 
I got it modded with the switch (and I modded it even more!  ), but from what I remember, it adds a cap to the circuit to cut some of the high frequencies.

Nice job!

So the power amp is the TDA2040? I'm planning a build of this project http://diyguitarfreak.wordpress.com/2010/09/15/the-miniamp-2-0/ but but it would be interesting to look at doing a hybrid amp.

Also what song are you playing in the demo clip? I've heard it before...

Thanks! The power amp is the TDA2050. Very little differencies with the TDA2040. I don't quite remember but I think it's the output wattage. The 2050 is bigger, and as we all know bigger is better! 

And the song! My absolute favourite from John Mayer:

Hector

[neve1272]

that clip sounds great